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160 Current news about the topic crystals

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World's first video recording of a space-time crystal

Periodic pattern consisting of magnons is formed at room temperature

10-Feb-2021

A German-Polish research team has succeeded in creating a micrometer-sized space-time crystal consisting of magnons at room temperature. With the help of the scanning transmission X-ray microscope MAXYMUS at Bessy II at Helmholtz Zentrum Berlin, they were able to film the recurring periodic ...

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Two-phase material with surprising properties

10-Feb-2021

Microstructure and macroscopic electro-mechanical properties are closely coupled in so-called ferroelectric polymers. An explanation for the high temperature dependence of this coupling has now been found at TU Wien. In certain materials, electrical and mechanical effects are closely linked: for ...

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How crystal defects can help convert waste heat into electricity

How crystal defects in Ni-based alloys give rise to high thermoelectric conversion efficiencies, advancing thermoelectric technology

28-Jan-2021

If we are to prevent the impending environmental crisis, it is imperative that we find efficient and sustainable ways to avoid being wasteful. One area with much room for improvement is the recycling of waste heat from industrial processes and technological devices into electricity. ...

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New butterfly-inspired hydrogen sensor is powered by light

Light-activated sensor delivers precision results at room temperature: For medical applications and hydrogen economy

07-Dec-2020

Inspired by the surface of butterfly wings, researchers have developed a light-activated hydrogen sensor that produces ultra-precise results at room temperature. The technology can detect hydrogen leaks well before they pose safety risks and can measure tiny amounts of the gas on people's breath, ...

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When human and machine agree

A human research team and a machine learning algorithm have found that we need to rethink much of what we know about iridium oxide

14-Oct-2020

Iridium oxide is an excellent catalyst for electrochemical reactions, and is typically used for the production of energy carriers such as hydrogen from water. Now it turns out that research on iridium oxide carried out so far has been based on a wrong basic assumption: The arrangement of the ...

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When crystals throw sparks

Voltage can be used for chemical reactions: New model for pyroelectric reactions developed

14-Sep-2020

Pyroelectricity is a phenomenon in physics in which heat can be converted into electricity via certain crystals or into a voltage that can be used for chemical reactions. While the first application is already used in devices such as motion detectors today, the second application, although ...

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Painting with crystals

12-Aug-2020

Semiconductors made of organic materials, e.g. for light-emitting diodes (OLEDs) and solar cells, could replace or supplement silicon-based electronics in the future. The efficiency of such devices depends crucially on the quality of thin layers of such organic semiconductors. These layers are ...

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Chemists create the brightest-ever fluorescent materials

11-Aug-2020

By formulating positively charged fluorescent dyes into a new class of materials called small-molecule ionic isolation lattices (SMILES), a compound's brilliant glow can be seamlessly transferred to a solid, crystalline state, researchers report August 6 in the journal Chem. The advance overcomes ...

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Tellurium makes the difference

International research team discovers unusual molecular structures

10-Aug-2020

The periodic system contains 118 chemical elements. However, only a few of them, such as hydrogen, carbon, nitrogen, oxygen and silicon, are of major importance in our daily lives. But things become really exciting from a chemical point of view when less well-known elements are involved. An ...

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'Blinking" crystals may convert CO2 into fuels

Unusual nanoparticles could could be useful for environmental cleanups, sensors, electronic devices and solar cells

21-Jul-2020

Imagine tiny crystals that "blink" like fireflies and can convert carbon dioxide, a key cause of climate change, into fuels. A Rutgers-led team has created ultra-small titanium dioxide crystals that exhibit unusual "blinking" behavior and may help to produce methane and other fuels, according to ...

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